【摘要】 为加快高产粮用和能源型甘薯新品种桂粉2号的推广应用,探索最佳的种植密度和氮、磷、钾肥施用量的配套高产栽培技术。采用4因子(1/2实施)5水平2次通用旋转回归试验设计,研究桂粉2号产量与栽插密度及N、P、K肥施用量之间的关系。结果表明,4个因素对产量的作用顺序为氮肥>磷肥>密度>钾肥;单产达32685.60 kg/hm2,以上优化方案为密度53835.00～55515.00株/hm2、纯氮用量116.85～125.10 kg/hm2、P2O5用量59.85～64.35 kg/hm2、K2O用量156.60～173.40 kg/hm2。不同的密度肥料组合与甘薯产量之间有极显著的回归关系,依据建立的产量与密度及氮、磷、钾施用量的回归模型,明确了产量与各因素之间的变化关系,为甘薯新品种桂粉2号的大面积推广种植提供了理论依据。更多还原

【Abstract】 The objective of this study was to accelerate the extensive application and production of sweet potato Guifen No.2,known for its high yield and energy type,and to explore the high-yield culture technique.The relevant densities and different fertilizers of nitrogen(N),phosphate(P),and potassium(K) were tested in field experiments using 4-factors-5-levels-twice-versatile regressive rotary compound design(half implementation).The regression model between densities and different fertilizers of nitrogen(N),phosphate(P),and potassium(K) was consequently established.From the measured results,the effects of fertilizer and density on the yield of sweet potato was N>P>density>K.The optimal combination for the maximum theoretical yield of 32685.60 kg·hm-2 of sweet potato was the density of 53835-55515 zhu·hm-2,N content of 116.85-125.10kg·hm-2,P2O5 content of 59.85-64.35kg·hm-2,and K2O content of 156.60-173.40 kg·hm-2.There was a significant positive correlation between the yield of sweet potato and the different groups of density and fertilizer.According to the regression model,the relation between yield and density and N,P,K was expounded to provide theoretical basis for the large-area growth of this new sweet potato cultivar Guifen No.2.更多还原